Real Important Question Needs Answering...

i have a iphone 3g jailbroken 3.1.2 using blackrain, my question is, my computer needs formatting therfore will lose itunes and will have to be put on again, will it automatically pick up my jailbroken iphone 3.1.2 or will i have to restore it again? thanks in advance.

it will let you play songs, videos, etc that you purchased through iTunes.

cheers mate, just really worried because everytime i open up itunes it reminds me that a 3.1.3 is available, and obvz i want to keep 3.1.2 on my itunes else il lose my jailbreak, so i should be ok yes?

Also be sure you have a copy of your iTunes library located in My Music. So then after you format you can copy it back. The phone will not update your OS from 3.1.2 to 3.1.3 unless you tell it to so like big9erfan and an ump would say "You'rrrrrrrrrre safe"